CVE-2026-56022

Webmin MFA bypass

CVSS 6.9 MEDIUMEPSS 0.3%CWE-308

Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.641.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Productos afectados

Webmin · Webmin

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Referencias

https://github.com/webmin/webmin/releases/tag/2.641 https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json https://webmin.com/security/#webmin-prior-to-2641 https://www.cve.org/CVERecord?id=CVE-2026-56022